void render(LineLabel label) {
tx.reset(canvas);
String txt = label.getText();
Paint p = label.get(Paint.class, Paint.class);
List<LineSegment> path = label.getPath();
for (int i = 0; i < txt.length(); i++) {
LineSegment line = path.get(i);
PointF p0 = tx.getWorldToCanvas().map(line.p0);
PointF p1 = tx.getWorldToCanvas().map(line.p1);
double theta = Math.atan((p1.y - p0.y) / (p1.x - p0.x));
Matrix m = canvas.getMatrix();
Matrix n = new Matrix(canvas.getMatrix());
n.preRotate((float) Math.toDegrees(theta), p0.x, p0.y);
// Paint debug = new Paint();
// debug.setColor(Color.RED);
// canvas.drawLine(p0.x, p0.y, p1.x, p1.y, debug);
canvas.setMatrix(n);
canvas.drawText(txt, i, i + 1, p0.x, p0.y, p);
canvas.setMatrix(m);
}
tx.apply(canvas);
// canvas.drawTextOnPath(l.text, l.getPath(), 0, 0, l.get(Paint.class,Paint.class));
}
void render(PointLabel label) {
tx.reset(canvas);
Paint p = label.get(Paint.class, Paint.class);
Coordinate a = label.getAnchor();
PointF f = tx.getWorldToCanvas().map(a);
canvas.drawText(label.getText(), f.x, f.y, p);
tx.apply(canvas);
}